Functional-integral approach to the investigation of the spin-spiral magnetic order and phase separation

Details Functional-integral approach to the investigation of the spin-spiral magnetic order and phase separation Functional-integral approach to the investigation of the spin-spiral magnetic order and phase separation

2011-09-09

arxiv.org/abs/1109.2037v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

We investigate a two-dimensional single-band Hubbard model with a nearest-neighbor hopping. We treat a commensurate collinear order as well as incommensurate spiral magnetic phases at a finite temperature using a Hubbard-Stratonovich transformation with a two-field representation and solve this problem in a static approximation. We argue that temperature dramatically influence the collinear and spiral magnetic phases, phase separation in the vicinity of half-filling. The results imply a possible interpretation of unusual behavior of magnetic properties of single-layer cuprates.

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